反应详情

温度

7.5 °C

To a stirred suspension of LiAlH4 (79 g, 2.08 mol, 5 eq) in THF (900 ml) at 0 to 5° C. under an atmosphere of nitrogen was added 4-(4-methoxyphenyl)-tetrahydro-2H-pyran-4-carbonitrile (90 g, 0.414 mol) in THF (900 ml) over a 25 minutes maintaining the temperature at 5 to 10° C. The reaction mixture was allowed to warm to ambient temperature and stirred until complete. Sodium hydroxide (2N, 850 ml) was added dropwise, the resulting solids filtered and washed with THF (2×800 ml), the organics concentrated in vacuo at 40° C. The residue was dissolved in EtOAc (300 ml) and dried over MgSO4, filtered and concentrated in vacuo at 40° C. to provide {[4-(4-methoxyphenyl)-tetrahydro-2H-pyran-4-yl]methyl}amine as a light yellow oil (92 g, quantitative).

1. temperatureto warm to ambient temperature
2. filtrationthe resulting solids filtered
3. washwashed with THF (2×800 ml)
4. concentrationthe organics concentrated in vacuo at 40° C
5. dissolutionThe residue was dissolved in EtOAc (300 ml)
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated in vacuo at 40° C.